(I also put this post on the equipement forum.)
What is the eyepiece on the left in this photo? (The center one is a 32mm Orion Sirius Plossl in a 2" adapter and the one on the right is a Surplus Shed 38mm erfle.) The mystery eyepiece is about 38mm fl and has a very wide ~65-70 degree FOV. Rather long eye relief, so it is a bit picky on eye position. There are no labels that I can see and as far as I can tell those diopter adjustments don't do anything (unless it is frozen with age). It came in a box of old astro equipment donated to the local middle school. I don't really know it's age. By the way, the views are great in it when you can get your eye positioned correctly.
Charlie
What is the eyepiece on the left in this photo? (The center one is a 32mm Orion Sirius Plossl in a 2" adapter and the one on the right is a Surplus Shed 38mm erfle.) The mystery eyepiece is about 38mm fl and has a very wide ~65-70 degree FOV. Rather long eye relief, so it is a bit picky on eye position. There are no labels that I can see and as far as I can tell those diopter adjustments don't do anything (unless it is frozen with age). It came in a box of old astro equipment donated to the local middle school. I don't really know it's age. By the way, the views are great in it when you can get your eye positioned correctly.
Charlie
Attached Image:
Fort Lewis Observatory: (37.238, -108.052) ~2360m (7744 ft.) elevation.
Darkness - typically 6.5+
Scope - Meade 16" LX200; f6.3 focal reducer
Focus - JMI Smart focus
Camera - SBIG ST-10XE; (~.5"/pixel)
Guiding - AO-8 and/or Meade 5"/DSI/PHD
http://www.fortlewis.edu/observatory
